know music video but dont know song or artist - dance/club song

Please can anyone help i saw a music video on music channel about 9 months ago and it was a dance song and it had a girl who had just split from her boyfriend in it and she went out to a club, and her ex was there dancing with other girls, and then she gets called into the dj box by her friends and is in there with the dj and then her ex spots her, and tries to make eye contact, and then the last scence is her looking like she is going to meet her ex as he waits for her and then she gets into the dj;s car....please can anyone tell me which song it is? i think the dj in the video may be the guy who did the song.....thanks xxx

Hehe, that's a good one. Tiesto is great!
I hope, you come back here, to get your answer.
It is: Tiësto feat. Nelly Furtado - Who Wants To Be Alone